Diodes Incorporated PI6C485352FAEX

Overview

PI6C485352FAEX from Diodes Incorporated (formerly Pericom) is a 12-output, 2-to-1 selectable differential LVPECL clock multiplexer buffer with dual differential inputs, 500 MHz max frequency, <4 ns propagation delay, and <100 ps output-to-output skew. It operates from 2.5V/3.3V supplies and supports LVDS/LVPECL/LVHSTL/SSTL/HCSL input levels in telecom clock distribution systems.

For engineers reviewing the PI6C485352FAEX datasheet, PI6C485352FAEX pinout, PI6C485352FAEX application, or PI6C485352FAEX equivalent, key selection criteria include differential input compatibility, LVPECL output skew performance, supply voltage flexibility, and TQFP-48 thermal and routing constraints in high-speed backplane timing designs.

Technical Context

The device implements a dual-input, 12-pair LVPECL fanout architecture with 12 independent SEL[0:11] control lines enabling per-output clock source selection between CLK0/CLK1 differential pairs. Input receivers accept multiple logic families without external level shifters.

Internal termination and biasing support single-ended clock injection via external resistor networks referenced to VCC/2; AC characteristics are specified across –40°C to +85°C with VCC = 3.3V ±10% and VCCO = 2.5V–3.3V.

Key Specifications

Pinout & Package

Package: 48-pin Pb-free Green TQFP (FA), 276-mil body width, JEDEC MO-026D compliant, θ_jA = 73°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LVPECL clock multiplexer applications.

Compared with ICS85352I-01LF and SY89853LMI, PI6C485352FAEX uniquely combines dual-input selection, multi-standard input compatibility, and 2.5V/3.3V output flexibility - critical for next-generation telecom platforms requiring field-upgradable timing paths and mixed-signal voltage domains.

Availability

PI6C485352FAEX is available at Aetrix Electronics and suitable for networking switches, telecom line cards, backplane computing, and high-frequency test equipment requiring stable component supply and long-term lifecycle assurance.

Supply support for PI6C485352FAEX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated acquired Pericom Semiconductor in 2017 and integrates high-performance timing, interface, and signal integrity solutions into its broad analog portfolio.

The PI6C485352 belongs to Diodes' precision clock buffer product line, engineered specifically for low-skew, multi-protocol clock distribution in datacom and telecom infrastructure where jitter, skew, and voltage flexibility directly impact system BER and synchronization stability.

FAQ

Can PI6C485352FAEX drive 50Ω loads directly?

Yes. Each LVPECL output pair is designed to drive 50Ω terminations to VCCO – 2.0V, meeting standard LVPECL DC specifications. Output voltage levels (VOH/VOL) and rise/fall times (150–700 ps) are characterized under this condition, and no external resistors are required for proper termination.

What is the function of SEL0–SEL11 pins?

Each SELx pin selects between CLK0/CLK1 differential input pairs for its corresponding Qx/¬Qx output pair. When SELx = 0, Qx/¬Qx mirrors CLK0/¬CLK0; when SELx = 1, it mirrors CLK1/¬CLK1. This enables per-output clock source routing without external multiplexers or FPGA logic.

Does PI6C485352FAEX support single-ended clock inputs?

Yes, via external biasing. The differential inputs can accept single-ended signals by applying VCC/2 reference voltage using resistor dividers (R1/R2) and bypass capacitor (C1) near the input pins, as shown in Figure 1 of the datasheet. This configuration maintains valid common-mode voltage for LVPECL/LVDS receivers.

Is PI6C485352FAEX pin-compatible with older Pericom PI6C485352 variants?

Yes. PI6C485352FAEX retains identical pinout, electrical behavior, and thermal profile as the original PI6C485352FAE. The "X" suffix denotes tape-and-reel packaging; all AC/DC specifications, package dimensions, and solder-reflow profiles remain unchanged per PD-2056 mechanical drawing.